Radio phone plug



Dec. 15,1925 7 C. W. DENNY ET AL RADIO PHONE PLUG Filed Aug. 4, 1922 275 W0, "juJM v 701% WW3,

Patented Dec. 15, 1925. v I

UNITED STATES PATENT OFFICE.

CHARLES W. DENNY AND WILLIAM E. MoLAUG-HLIN, OF MIDDLETOWN, OHIO, AS-SIGNORS TO THE BARKELEW ELECTRIC MANUFACTURING COMPANY, OF HIDDLE- TOWN,OHIO, A CORPORATION OF OHIO. l

annro rnonn PLUG.

Application filed August 4, 1922. Serial no. 579,594.

' To all whom it may concern:

Be it known that we, CHARLES W. DENNY and \VILLIAM E. MCLAUGHLIN,citizens of the United States, residing at Middletown,

in the county of Butler and State of Ohio,

have invented certain new and useful Impr'ovements in Radio PhonePlugs,of which the following is a specification, reference beinghadtherein to the accompanying drawing.

Our invention relates to telephone apparatus and in particular to 'suchapparatus adaptable for radio equipment. I

It's an object of our invention to provide a re io phone plug which willaccommodate a plurality of phones on a single plug to enabletheattachment of all the phones as a unit to various arts 0 the radioapparatus in connection with the different Ijacks, a

It. is a-further object of our invention to provide a thoroughlyinsulated portable unit which will fit standard equipment.

It is an additional ob'ec't of our invention toprovidea plug whic can bereadily assembled and cheaply manufactured out of ordinary materialswithout the necessity of special apparatus or equipment for producingit.

It is a still further object to provide a plug which will insurepositively the connection of the phones therewith and which will elfectthe connection of the phones within a limited area andi'positively holdthe 85 phones in such connection.

Referring to the drawings:

Fig. 1 is a side elevation of our phone lug installed on the board incontact with Fig.2 is a section taken longitudinally through our plug.

Fig. 3 in a ront elevation looking in direction of the arrows from theposition 3--3 oi Fig. 1.

Fig. 4 is a rear elevation of the plug head with the stem in sectiontaken on the lines 4-4 of Fig. 1.

Fig. 5 is a diagram showin the connection of the plug phones and t eremainder ofthe apparatus in various positions.

Referring to the drawings in detail:

1 is asupport which carries a jack 2 having the usual contact fingers 3and 4 supported in the insulating block 5.

The plug itself is inserted in an aperture in which is lined b a collar6 having a pro ecting shoulder against which the shoulder 8 of the plugabuts.

Referring to the plug itself, specifically it consists of a forwardplate 9 on which a part of the contacts are made on one side of thecircuit and a rear plate 10 with which the remainder of the contacts aremade on the other half of the circuit. Set screws 11 are provided ineach half to firmly engage the phone pins with the respective halves.'Apertures l2 and 13 are provided for these pins. 12 is withoutinsulation because the contact is to be made at that point with 10 while13 is provided with insulation because it is desired to prevent contactof the phone With 9 at that point.

A similar condition exists in connection with a similar construction in9 where at 14 the contact is to be made and at 15 no contact is to bemade.

As desired an insulation plate is interposed between the two halves.This plate I may be of a single piece including the insulating liners at15 or, these liners may be separated from the main insulating disc 16.

It will be observed that the internal pin 17 is in contact with 9 andextends outwardly'to a contact head 18 which engages with the contactfinger 4 of the jack.

Surrounding this member 17 is an insulating sleeve 19 which terminatesin an insulating collar 20, which separates 18 from a sleeve 21. Thissleeve is in contact with a collar 8. The collar 8 in turn is in contactwith 10.

It will be noted that where the pins make contact with a plate that theaperture such as 12 or Mis smaller than the aperture 13 and 15 to insurethe contact with the plate.

The phones are designated 22.

It will be understood that we do not desire to be confined to thedetails of the particular embodiment which we have shown herein butcomprehend within our invention necessary and suitable modifications toadapt it to all'varying conditions.

Having thus fully described our invention, which we claim as new anddesire to secure by Letters Patent, is

1. In a radio phone plug, a front plate having apertures, a rear platehaving apertures adapted to register with the apertures in the frontplate, insulating means between said plates adapted to project through apart of the apertures in either late, whereby when the plates. areadjusted an insulated aperture in one plate will always be in registerwith a non-insulated aperture in the other plate.

. having apertures, a rear plate having aper-- in the front plate,insulating means between said plates adapted to project through aaperture in one plate will always be in 15 register with a non-insulatedaperture in the other plate and means on the periphery of each plateassociated with the non-insulated apertures for engaging phone cordtips.

In testimony whereof, we affix our signa- 20 tures.

CHARLES W. DENNY. WILLIAM E. MCLAUGHLIN.

